723c9ed2f0
Previously, if you called `Fill` on an `ArrayHandleStride`, you would get an exception that said the feature was not supported. It turns out that filling values is very useful in situations where, for example, you need to initialize an array when processing an unknown type (and thus dealing with extracted components). This implementation of `Fill` first attempts to call `Fill` on the contained array. This only works if the stride is set to 1. If this does not work, then the code leverages the precompiled `ArrayCopy`. It does this by first creating a new `ArrayHandleStride` containing the fill value and a modulo of 1 so that value is constantly repeated. It then reconstructs an `ArrayHandleStride` for itself with a modified size and offset to match the start and end indices. Referencing the `ArrayCopy` was tricky because it kept creating circular dependencies among `ArrayHandleStride`, `ArrayExtractComponent`, and `UnknownArrayHandle`. These dependencies were broken by having `ArrayHandleStride` directly use the internal `ArrayCopyUnknown` function and to use a forward declaration of `UnknownArrayHandle` rather than including its header.
1.2 KiB
Support Fill for ArrayHandleStride
Previously, if you called Fill on an ArrayHandleStride, you would get
an exception that said the feature was not supported. It turns out that
filling values is very useful in situations where, for example, you need to
initialize an array when processing an unknown type (and thus dealing with
extracted components).
This implementation of Fill first attempts to call Fill on the
contained array. This only works if the stride is set to 1. If this does
not work, then the code leverages the precompiled ArrayCopy. It does this
by first creating a new ArrayHandleStride containing the fill value and a
modulo of 1 so that value is constantly repeated. It then reconstructs an
ArrayHandleStride for itself with a modified size and offset to match the
start and end indices.
Referencing the ArrayCopy was tricky because it kept creating circular
dependencies among ArrayHandleStride, ArrayExtractComponent, and
UnknownArrayHandle. These dependencies were broken by having
ArrayHandleStride directly use the internal ArrayCopyUnknown function
and to use a forward declaration of UnknownArrayHandle rather than
including its header.